Problems

	Submissions				Users
Name	Total	Acc.	Ratio	Fastest	Total	Acc.	Ratio	Difficulty
0-1 Sequences	7189	1046	15%	0.00	1386	695	50%	6.9
10 Kinds of People	13127	2702	21%	0.01	2291	1561	68%	5.3
2048	7129	3299	46%	0.00	3207	2726	85%	2.6
3D Printed Statues	7915	3652	46%	0.00	3389	3041	90%	2.0
3D Printer	601	115	19%	0.00	229	91	40%	8.4
3-Sided Dice	2113	187	9%	0.00	343	128	37%	8.6
4 thought	7107	2376	33%	0.00	2389	1990	83%	2.8
A1 Paper	4623	1361	29%	0.00	1343	1066	79%	3.6
Aaah!	24616	11484	47%	0.00	10315	9604	93%	1.6
Abandoned Animal	1460	307	21%	0.03	373	270	72%	5.1
ABC	10712	4841	45%	0.00	4614	4194	91%	1.8
Ab Initio	503	97	19%	0.10	90	59	66%	8.2
Above Average	6508	2719	42%	0.00	2674	2409	90%	1.9
A+B Problem	6914	674	10%	0.03	984	326	33%	8.3
A Brief Gerrymander	190	42	22%	0.15	44	27	61%	8.3
Abstract Art	239	71	30%	0.00	71	54	76%	5.4
Absurdistan Roads II	535	195	36%	0.00	192	131	68%	6.8
Absurdistan Roads III	1332	371	28%	0.02	358	276	77%	5.5
Access Points	282	111	39%	0.01	105	78	74%	6.3
A Classy Problem	8156	2071	25%	0.01	1811	1391	77%	4.6
ACM Contest Scoring	5804	3645	63%	0.00	3220	3037	94%	1.5
Adding Words	8805	2066	23%	0.00	2031	1551	76%	4.1
A Different List Game	6281	430	7%	0.00	782	158	20%	9.2
A Different Problem	26239	9829	37%	0.00	9073	7871	87%	2.4
Adjoin the Networks	1700	459	27%	0.00	407	320	79%	5.5
Administrative Difficulties	987	227	23%	0.03	244	166	68%	6.2
Advanced Causal Measurements	57	18	32%	0.10	22	18	82%	6.3
Adventure Begins	219	69	32%	0.06	78	58	74%	4.1
Adventures in Moving -- Part IV	892	262	29%	0.00	231	199	86%	4.3
A Favourable Ending	1380	359	26%	0.00	335	251	75%	4.7
A Feast For Cats	1822	634	35%	0.00	428	360	84%	4.3
A Flea on a Chessboard	295	66	22%	0.01	80	59	74%	5.0
Air Conditioned Minions	4364	1204	28%	0.00	1273	952	75%	3.8
Airline Hub	1703	315	18%	0.01	342	192	56%	6.8
Airport Coffee	803	173	22%	0.09	165	119	72%	7.2
Airport Construction	3254	416	13%	0.02	334	178	53%	7.4
Airport Logistics	49	12	24%	0.00	18	12	67%	7.4
Airports	379	107	28%	0.11	111	79	71%	6.5
Akcija	6198	2741	44%	0.00	2495	2212	89%	2.0
Aladin	749	75	10%	0.10	120	28	23%	8.3
Alchemy	98	16	16%	0.02	29	16	55%	8.7
Alea iacta est	32	13	41%	0.34	17	13	76%	6.9
Alice in the Digital World	2749	746	27%	0.01	719	568	79%	3.9
Alien Codebreaking	145	9	6%	3.23	26	7	27%	8.8
Alien Numbers	1993	1032	52%	0.00	1004	911	91%	2.0
A List Game	7210	2112	29%	0.00	2026	1701	84%	3.1
All about that base	2633	1034	39%	0.00	1007	844	84%	2.9
All Different Directions	1089	460	42%	0.00	431	374	87%	2.7
Allergy Test	436	123	28%	0.00	137	70	51%	7.8
All Friends	829	158	19%	0.00	149	77	52%	8.9
All Just A Dream	1666	384	23%	0.05	265	185	70%	6.7
All Pairs Shortest Path	7855	1393	18%	0.02	951	670	70%	5.8
Almost Perfect	6542	1505	23%	0.00	1615	1252	78%	3.7
Almost Union-Find	5750	1026	18%	0.02	918	530	58%	6.6
Alphabet	1257	614	49%	0.00	619	523	84%	3.1
Alphabet Animals	955	343	36%	0.01	349	287	82%	2.5
Alphabet Spam	6743	4267	63%	0.00	3425	3295	96%	1.3
Alternative Bracket Notation	203	84	41%	0.00	90	74	82%	5.5
Altruistic Amphibians	363	92	25%	0.24	91	65	71%	5.0
Amalgamated Artichokes	3514	1579	45%	0.01	1432	1244	87%	2.8
Amanda Lounges	1357	375	28%	0.03	348	272	78%	5.6
A Mazing!	2404	518	22%	0.09	246	186	76%	5.1
Amazing Adventures	277	74	27%	0.02	84	57	68%	5.8
Amazing Race	275	75	27%	0.39	83	60	72%	6.6
Ambiguous Result	230	55	24%	0.02	82	52	63%	7.8
Amsterdam Distance	1216	535	44%	0.00	576	475	82%	2.8
A Multiplication Game	640	199	31%	0.00	229	167	73%	4.9
Anagram Counting	3106	1196	39%	0.00	1151	959	83%	3.0
Andrew the Ant	234	67	29%	0.06	79	59	75%	5.6
A New Alphabet	9581	4330	45%	0.00	4046	3743	93%	1.8
An I for an Eye	529	125	24%	0.00	145	102	70%	5.1
Animal Classification	1538	353	23%	0.03	302	201	67%	6.7
An Industrial Spy	1405	736	52%	0.02	584	502	86%	3.2
Another Brick in the Wall	2810	1375	49%	0.00	1338	1222	91%	1.9
Another Candies	6934	1874	27%	0.00	1962	1614	82%	2.8
Another Dice Game	89	64	72%	0.00	58	53	91%	3.3
Another Query on Array Problem	1359	173	13%	0.05	292	125	43%	7.8
Antenna Placement	92	49	53%	0.00	30	26	87%	4.0
Anthony and Cora	782	204	26%	0.00	244	171	70%	5.4
Anthony and Diablo	2574	896	35%	0.00	891	767	86%	2.6
Antiarithmetic?	1178	221	19%	0.01	282	160	57%	7.2
Ants	3160	1398	44%	0.00	1119	981	88%	2.5
Apaxiaaaaaaaaaaaans!	11209	6844	61%	0.00	6117	5868	96%	1.3
Apostrophe Catastrophe	86	23	27%	0.00	24	17	71%	6.0
Appalling Architecture	468	132	28%	0.00	117	99	85%	3.7
Apparatus	650	166	26%	0.01	132	99	75%	5.7
Apple Market	461	93	20%	0.07	113	58	51%	8.2
Apples, Cherries, and Mangos	400	123	31%	0.02	125	91	73%	6.0
A Prize No One Can Win	1401	582	42%	0.00	533	470	88%	2.4
Aquarium Tank	469	129	28%	0.00	124	97	78%	5.2
Aqueduct Construction	171	66	39%	0.01	48	42	88%	5.7
A Question of Ingestion	1175	289	25%	0.00	273	207	76%	5.8
Arable Area	265	65	25%	0.04	65	42	65%	7.9
Arachnophobia	282	86	30%	0.14	79	65	82%	4.9
A Random Problem	265	65	25%	0.00	64	42	66%	5.6
A Rational Sequence	1552	527	34%	0.00	550	404	73%	4.6
A Rational Sequence 2	1943	1437	74%	0.00	1276	1224	96%	1.5
A Rational Sequence (Take 3)	771	637	83%	0.00	517	497	96%	1.7
Arbitrage?	1827	379	21%	0.02	283	229	81%	3.6
Arcade!	1205	219	18%	0.01	210	151	72%	6.0